Floor furnace closely confined in a pit and having an access door



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A. M. ODOM 1 FLOOR FURNACE CLOSELY CONFIN A PIT AND HAVING AN ACCESSDec. 6, 1949 Filed July 12, 1946 2 Sheets-Sheet Inventor /7l/-SPHREYM000M y Qua and n-rllllll lllllllllll.lllllllllllllll hang:

A. M. ODOM FLOOR FURNACE CLOSELY GONFINED IN Dec. 6, 1949 2,490,464 7 APIT AND HAVING AN ACCESS DQOR 2 Sheets-Sheet 2 Filed July 12, 1946Inventor JaSPHREYM 000M Patented Dec. 6, 1949 FLOOR FURNACE CLOSELYCONFINED IN A ?IT AND HAVING AN ACCESS DOOR Ausphrey M. Odom, Memphis,Tenn.

Application July 12, 1946, Serial No. 683,022

1 Claim. 1

This invention relates to an access door for a floor furnace and has forits primary object to facilitate the connection of the furnace to a fuelsupply pipe and to the flue through which the products of combustion arevented.

Another object of the invention is to permit the use of floor furnacesin pits of minimum dimensions.

The above and other objects may be'attained by employing this inventionwhich embodies among its features an opening through one side of theshell of the furnace through which access may be had to the fuel supplypipe and the flue connection to the furnace, and a door applicable fromthe interior of the shell to close the opening.

Other features include detachable fasteners operable from the interiorof the shell to hold the door in a position to close the opening in theshell of the furnace.

In the drawings,

Figure 1 is a sectional view through a pit showing my improved furnaceinstalled therein,

Figure 2 is a horizontal sectional view taken substantially along theline 2-2 of Figure 1,

Figure 3 is a sectional View taken substantially along the line 3-3 ofFigure 2, and

Figure 4 is a sectional view taken substantially along the line 4-4 ofFigure 2.

Referring to the drawings in detail, the floor ll] of a buildingstructure is equipped with a pit H to which a cold air duct I2 leadsfrom the exterior of the building in a conventional manner. Aconventional floor furnace of the type sold under the trade-mark Colemandesignated generally I3 is shown as entering the pit and is suppliedthrough pipes i i with fluid fuel in a conventional manner while theproducts of combustion are discharged to a flue through a conventionalflue pipe connected to the furnace IS. The structure so far recited isthat commonly employed except that the pit H in prior constructions mustbe made of such large dimensions as to accommodate the workmen betweenthe wall of the furnace and the wall of the pit in order to make thenecessary connection to the fuel pipe l4 and the flue.

In order to permit the furnace to be employed in a pit of smallerdimensions I form in the outer shell l6 of the furnace an access dooropening I! which is adapted to be closed by a removable door panel l8held to the casing or shell l6 of the furnace by means of suitablefasteners l9 which may be manipulated from the interior of the furnace.It is to be noted that the door it overlaps the marginal edges of theopening I I on the inner face of the wall of the shell as clearlyillustrated in Figure 2. A suitable gas-tight gasket is interposedbetween the overlapping 2 edge of the door I 8 and the adjacent portionof the shell or casing Hi.

In installing the furnace the fuel pipe I4 is equipped with a union 2|carried on a nipple 22 which is of such a length as to permit access tothe union 2| through the opening ll. This union is in turn, connected tothe fuel pipe 23 of the furnace after the furnace has been lowered intoplace and before the panel or door I3 is secured in position to closethe opening [1. Likewise, the flue coupling 24 of the furnace isconnected to the pipe I5 through the opening I! after which the door I8is secured over the opening from the interior of the furnace in order toeffectively enclose the furnace. From the foregoing it will be obviousthat a pit l I need be only of a dimension sufiicient to accommodate thefurnace and the piping, as access may be had to effect the coupling ofthe furnace to the piping through the opening l1.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing from the spirit and scope of theinvention as claimed.

I claim as my invention:

In a furnace construction including a pit below the level of the floorof a building structure; a floor furnace, said furnace including aheating unit, a shell surrounding the bottom and sides of the heatingunit, the walls of the pit closely surrounding the shell, fuel pipe andflue connections connected to the heating unit and disposed outside ofthe shell adjacent one side thereof, fuel pipe and flue connections inthe pit adjacent the side of the shell adjacent which the firstmentioned fuel pipe and flue connections are disposed, said shell havingan access opening in the side adjacent the fuel pipe and flueconnections through which the fuel pipe and flue connections areaccessible, and a door detachably connected to the inside of the shelland accessible through the top of the furnace for closing the accessopening, the space between the shell and the walls of the pit beinginaccessible except through the access opening.

- AUSPI-IREY M. ODOM.

REFERENCES CITED The following references are of record in the file ofthis patent:

